Level-1bThe SMOS level 1b products are the output of the image reconstruction of the SMOS observation measurements and consist of Fourier Components of Brightness Temperatures in the antenna polarisation reference frame.

Level-1cSince level-1b products are arranged as snapshots and not geographically sorted, SMOS level-1c products constitute reprocessed level-1b, which are geographically sorted, that is swath-based maps of Brightness Temperature.

Level-2Level-2 products are of two separate types:

Soil Moisture swath-based maps

Ocean Salinity swath-based maps

Global maps using level-3 data are produced in the next processing step.